After the third round of the inaugural LPGA Lotte Championship, Ai Miyazato leads Cristie Kerr and second-round co-leader Azahara Munoz by three shots.
Miyazato shot 2-under 70 at Ko Olina Golf Club to reach 10 under.
Munoz, who shot a career-low 64 Thursday, shot 73 Friday. Kerr made four birdies and three bogeys to shoot 71.
If Kerr wins Saturday, she would become the first American player to win an LPGA event in the United States this season.
2011 U.S. Women's Open winner So Yeon Ryu, three-time 2012 winner Yani Tseng, Jiyai Shin, Meena Lee and Singapore winner Angela Stanford are all tied for fourth place at 6 under.
Scoring conditions continued to be difficult Friday, with just 21 of 74 players to make the midway cut able to break par Friday.